ABSTRACTCoal mining has occurred in Pennsylvania for over a century. A method of coal mining known as Longwall Mining has become more prevalent in recent decades.
Longwall mining involves full extraction of the coal seam in the longwall panel. The longwall mining machinery cuts or shears the coal off the face of a long wall panel of coal in a single pass. The machinery will then advance forward and perform another pass along the coal face. The broken off coal is hauled to the surface using conveyor belts. As the machinery advances forward into the coal panel, the mine roof is allowed to collapse behind it. This dataset identifies the footprint of these longwall panels relative to the surface.